A column carrying a vertical downward dead load and live load of 120 kN and 100 KN, respectively, is to be supported on a 1.5 m deep square spread footing. The soil beneath this footing is an undrained clay with Su- 48 kN/m and y = 16.2 kN/m, and the groundwater table is at a great depth. Compute the width B required to obtain a factor of safety of 3 against a bearing capacity failure by using Terzaghi's formula. Note 1: Use the average unit weight of the soil and concrete for Wf. (yconcrete = 24kN/m) Note 2: P=1.4DL+1.6LL Note 3: For undrained total stress analyses, use CT = Su and $T = 0.